He says, “Thou wilt make Him Lord over the works of Thy hands” and “Thou hast put all things under His feet.” Thereby he testifies that Christ, true man, is also at the same time true God. For God does not make anyone Lord over the works of His hands nor put all things under anyone’s feet unless He is His equal, that is, unless He is God. God alone is Lord over the works of His hands and has all things under His feet. Since this Man Christ, who was forsaken of God for a little time, is to be made Lord over God’s works—heaven, angels, sun, moon, earth, men, air, water, and everything that is in heaven, on earth, and in the water—it follows that He is true God.
Luther’s works, vol. 12: